Today, Arizona Republican Sens. John McCain and Jeff Flake, two authors of the bipartisan comprehensive immigration bill that passed the Senate in June, will participate in an hour-long forum on immigration sponsored by The Arizona Republic, KPNX-TV, Phoenix, azcentral.com and USA TODAY.

The forum will be livestreamed on azcentral.com and usatoday.com beginning at 1 p.m. Eastern, 10 a.m. Pacific. You can follow hashtag #azbordertalk on Twitter.

The senators are expected to discuss the key aspects of their bill, including its impact on jobs, and make their case for why reform is needed, including a path to citizenship for many of the estimated 11 million undocumented immigrants in the United States.

The 13-year path outlined in the bill, which would require payment of taxes, fees and penalties, is decried as "amnesty" by critics but called crucial by President Barack Obama and pro-reform Democrats and Republicans.

Among the topics that could come up today are immigration reform's impact on border security, on jobs and wages, and on the economy.